A club is an association of people united by a common interest or goal. The service club, for example, exists for voluntary or charitable activities; there are clubs devoted to hobbies and sports, social activities clubs, political and religious clubs, and so forth.

An organization (or organisation) is a social arrangement which pursues collective goals, which controls its own performance, and which has a boundary separating it from its environment. The word itself is derived from the Greek word (organon) meaning tool. The term is used in both daily and scientific English in multiple ways.